<template>
  <!-- 隐藏类active -->
  <div class='home-category' @mouseleave="categoryId = null">
    <ul class=" menu">
      <!-- 绑定类active -->
      <li :class="{ active: categoryId === item.id }" v-for="item in menuList" :key="item.id"
        @mouseenter="getCategoryId(item.id)">
        <RouterLink :to="`/category/${item.id}`">{{ item.name }}</RouterLink>
        <template v-if="item.children">
          <RouterLink v-for="sub in item.children" :key="sub.id" :to="`/category/sub/${sub.id}`">
            {{ sub.name }}
          </RouterLink>
        </template>
        <!-- 有内容时显示内容,无时自定义骨架屏插件 -->
        <template v-else>
          <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
          <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
        </template>
      </li>
    </ul>
    <!-- 弹层 -->
    <div class="layer">
      <h4 v-if="currCategory">{{ currCategory.id === 'brand' ? '品牌' : '分类' }}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <!-- 存在才展示 -->
      <ul v-if="currCategory && currCategory.goods && currCategory.goods.length">
        <li v-for="item in currCategory.goods" :key="item.id">
          <RouterLink :to="`product/${item.id}`">
            <img v-lazy="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{ item.name }}</p>
              <p class="desc ellipsis">{{ item.desc }}</p>
              <p class="price"><i>¥</i>{{ item.price }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌展示 -->
      <!-- 存在才展示 -->
      <ul v-if="currCategory && currCategory.brands && currCategory.brands.length">
        <li class="brand" v-for="item in currCategory.brands" :key="item.id">
          <RouterLink :to="`/product/${item.id}`">
            <img v-lazy="item.picture" alt="">
            <div class="info">
              <p class="place"><i class="iconfont icon-dingwei"></i>{{ item.place }}</p>
              <p class="name ellipsis">{{ item.name }}</p>
              <p class="desc ellipsis-2">{{ item.desc }}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
    </div>
  </div>

</template>
<script lang="ts" setup>
import { reactive, computed, ref } from 'vue'
import categoryStore from '../../store/index'
import { storeToRefs } from 'pinia'
import { findBrand } from '../../api/home'
const { category } = categoryStore()
const { list } = storeToRefs(category)
// 根据pinia的分类数据和组件中定义品牌数据，得到左侧分类完整数据(9分类 + 1品牌)数组
interface List extends Array<any> {
  id: string,
  name: string
  children: []
  goods?: []
  brands: []
}
//  需要在组件内部，定义一个品牌数据
const brand = reactive({
  id: 'brand',
  name: '品牌',
  children: [{ id: 'brand-chilren', name: '品牌推荐' }],
  goods: undefined,
  // 品牌数据
  brands: []
})
const menuList = computed(() => {
  //  获取vuex的一级分类，并且只需要两个二级分类
  const getlist = (list.value as List).map(item => {
    return {
      id: item.id,
      name: item.name,
      // 防止初始化没有children的时候调用slice函数报错
      children: item.children && item.children.slice(0, 2),
      goods: item.goods
    }
  })
  getlist.push(brand)
  return getlist
})
// 获取当前分类Id逻辑
let categoryId = ref(null)
const getCategoryId = (Id) => {
  categoryId.value = Id
}
const currCategory: any = computed(() => {
  // 根据Id返回当前商品的分类数据
  return menuList.value.find(item => item.id === categoryId.value)
})
// 发起请求拿到品牌数据，因为setup的存在不是使用ansyc,awiwt
findBrand('6').then((data: any) => {
  brand.brands = data.result
})
</script>
<style lang="less" scoped>
@import '../../assets/styles/mixins.less';
@import '../../assets/styles/variables.less';

.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;

  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;

      &:hover,
      &.active {
        background: @xtxColor;
      }

      a {
        margin-right: 4px;
        color: #fff;

        &:first-child {
          font-size: 16px;
        }
      }
    }

    // 骨架屏动画样式
    .xtx-skeleton {
      animation: fade 1s linear infinite alternate;
    }

    @keyframes fade {
      from {
        opacity: 0.2;
      }

      to {
        opacity: 1;
      }
    }
  }

  .layer {
    position: absolute;
    display: none;
    left: 250px;
    top: 0;
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    padding: 0 15px;

    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;

      small {
        font-size: 16px;
        color: #666;
      }
    }

    ul {
      display: flex;
      flex-wrap: wrap;

      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;

        &:nth-child(3n) {
          margin-right: 0;
        }

        a {
          display: flex;
          align-items: center;
          width: 100%;
          height: 100%;

          padding: 10px;

          &:hover {
            background: #e3f9f4;
          }

          img {
            width: 95px;
            height: 95px;
            object-fit: cover;
          }

          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;

            .name {
              font-size: 16px;
              color: #666;
            }

            .desc {
              color: #999;
            }

            .price {
              font-size: 22px;
              color: @priceColor;

              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }

    // 品牌展示样式
    li.brand {
      height: 180px;

      a {
        align-items: flex-start;

        img {
          width: 120px;
          height: 160px;
        }

        .info {
          p {
            margin-top: 8px;
          }

          .place {
            color: #999;
          }
        }
      }
    }
  }

  &:hover {
    .layer {
      display: block;
    }
  }
}
</style>